Multitester tested for voltage. Plug-In wall mount AC-DC voltage EQUIVALENT adapter to BOSS PSA power supply with the following: AC input 120V and DC output: 9V 200mA (aka: 9 volts 0.2 amps or higher). Amperage can be higher, but never lower. Round barrel connecter with a hollow NEGATIVE center. Please check your device for compatibility before bidding. Questions are encouraged. Color, size and shape may differ from auction photo. S H in the contiguous USA is $7.(insured shipping). Please see other interesting auctions by JGrit USPS DELIVERY TIME: As stated in the item listing, seller will drop-off your item to the USPS within 5 days of receiving cleared payment. How long it takes to deliver to your door is strictly within USPS control and not within the control of seller. Please leave 5 stars for seller 5 day drop-off time.